Valve-operating means



Feb.. 24. 19.25. 11321456 E. WOYDT ET AL VALVE OPERATING MEANS FiledFeb. 29, 1924 Patented Feb. 24, 1925.

UNITED STATES PATENT oFFlcE.

vEDFAIRD WOYDT .AND DEJOE CSANDY, F DETRDIT, MICHIGAN.

VALVE-OPERATING MEANS.

'. Application led February 29, 1924. Serial No. 695,981.

To 'whom t may concern ".Be it known that we,`EDWARD Worn'r, a

ing mechanism and has special reference to a cam action that may beadvantageously used in connection with high pressure internal combustionengines, especially of that type in which the liquid fuel, asl gasoline,is delivered to the combustion chambers or cylinders of the engines.

The primary object of our invention is to provide a set of cams foroperating a single valve member, one of the cams having a constantaction and the other a variable action, whereby compreion ratio of anengine may be changed during the operation of the engin Another objectof our invention is to provide valve operating means including a camwithin a cam and no'vel means for adjusting the inner cam whereb it mayhave a valve opening action in a Vance or behind the outer cam. i Afurther object of this invention is to provide a set of cams foroperating a valve member with the cams arranged to be actuated insynchronism or one cam in `advance of the other with reeiprocable meansfor adjusting one of said cams. The above are a few of the objectsattained by our invention and others will appear as the nature of ourvalve o erating be means is better understood, by ai of the accompanyingdrawing and the. following description. A

vIn the drawing,

Figure 1 is a bottom plan of one form o valve operating mechanism inaccordance with our invention;

Fig. 2 is a side elevation of a valve member engaged by two cams adaptedto cooperate in actuating the valve member;

Fig. 3 is a similar view showing one of the cams positioned to followthe action of the other cam;

, Fig. 4 is a vertical longitudinal sectional vewillustrating anotherform of our invention wherein one cam is within the other;

Fi 5 is a cross sectional view taken on the line V--V of Fig. 4 showingthe cams arranged to operate together; l

Fig. is a similar view showing theinner cam adjusted relative to theouter cam;

Fig. 7 is a longitudinal sectional view cfa y hollow cam member; Fig. 8is a cross sectional view of Same;

Fi 9 is. a longitudinal an a justable cam;

sectional view of Fig. 10 is a cross sectional view of the Same;

Fig. 11 is a longitudinal sectional View of another form of hollow cammember;

Fig. 12 is a cross sectional view of the same;

Fig. 13 is a vertical longitudinal sectional View illustrating a furthermodification of our invention, vand Fig. 14 is a cross sectional Viewtaken on the line XIV-XIV of Fig. 13.

Reference will first be had to Figs. 1 to 3 inclusive showing a bearing1 for parallel cam shafts 2 and 3 provided with cams 4 and 5respectively adapted to actuate a puppet valve member 6.

On the cam shaft 2 is a long pitch or spiral gear wheel 7 meshing with asimilar gear wheel 8 on a driven shaft 9.

v Telesco ing the end of the cam shaft 3 and slida le thereon vandadapted to rotate with said shaft is a sleeve 10 having .one endprovided with a small spiral gear wheel 11 meshing with the gear wheel7, so that the shaft 9 may drive the cam shafts 2 and 3 andsimultaneously operate the cams 4 and 5, which if in the relation shownin Fig. 2, will cooperate in actuating the valve mem- Loosely connectedto the sleeve 10 is a yoke 12 carried by an adjustable rod 13 in thesupport 14 provided with means 15 for holding the rod 13 in adjustedposition. During the operation of the cam shafts 2 and 3 the adjustablerod 13 may reciprocate the sleeve 10 to move the spiral gear wheel 11longitudinally of the spiral gear wheel 7 larit of the cam 5 relative tothe cam 4,

for instance as shown in Fig. 3, where the cam 5 lags behind the cam 4considering the shafts 2 and 3 driven in an equalized direction. Thismeans that the cam 4 initially actuates the valve member and is followedby the cam 5, thus prolonging the actuation of the valve member. If thevalve member controls a puppet valve such valve will be held open for aperiod of time greater than that caused b the cams 4 and 5 operatingtogether, as s own in Fig. 2. 4

In Figs. 4, 5 and 6, we show another form of our invention wherein abearing 16 supports the hub portion 17- of a gear wheel 18 driven from agear wheel 19 on a drive shaft 20. Mounted in or integral with the hubportion 17 of the gear Wheel 18 is a tubular hollow cam member 21 havinga portion thereof pressed out to form an outer cam 22 which is slotted,as at 23 to provide clearance for an inner cam 24. The inner cam 24 isslidably keyed relative to a shaft 25 which extends axially of thehollow'cam member 21 and is slidably keyed in a spiral member 26ad'ustable axially of the gear wheel 18, sai spiral member having athreaded engagement with the gear Wheel which permits of the spiralmember being driven by the gear Wheel and at any time during therotation of the gear wheel adj usted therein. The spiral member 26serves practically the same purpose as the small spiral gear Wheel 11previously mentioned, and at the outer end of the spiral member 26 is ayoke 27 carried by an adjustable rod 28 in a support 29, the elements27, 28 and 29 being similar to the elements 12, 13 and 14 previouslydescribed.

During rotation of the gear wheel 18 the spiral member 26 may beadjusted to change the angularity of the cam 24 relative to the cam 22,as best brought out in Figs. 5 and 6.

In Figs. 7 and 8 we show the cam member 21 outpressed to form a cam 3()and a somewhat similar cam may be formed, as shown in Figs. 11 and 12 byslitting the cam member 21, as at 31 and pressing the slitted portionoutwardly to form a cam 32.

Figs. 9 and 10 show how the cam member 21 may be slotted, as at 33 toprovide clearance for a cam 34 on the shaft 25.

Considering Figs. 13 and 14, the cam member 21 has a longitudinal slot35 providing clearancefor a beveled cam 36 radially disposed on theshaft 25. The shaftl 25 may be adjusted relative to the spiral member 26by 4an adjusting rod 37 loosely connected to said shaft and held by asupport 38 provided With a locking device 39. The beveled cam 36 isadapted to engave the edge of the valve member 6 and it 1s obj viousthat the shaft 25 may be shifted longitudinally of the Vcam member 21 tovary the action of the cam 36 relative to the valve member 6. By thesliding of the said cam 36 towards the valve member 6it may be broughtinto actuating position and thereby lronodify the operation of the saidcam mem- It is thought that the operation and utility of our inventionwill be apparent without further description, and while in the drawingthere are illustrated the preferred embodiments of our invention it isto be understood that the structural elements are susceptible to suchvariations and modifications as, fall within the scope of the appendedclaims. V

What we claim is 1. In a valve operating mechanism, means for theoperation of a single valve comprising a tubular cam sha-ft having avalve operating cam thereon, and a further cam adapted to bereciprocated into operative position modifying the operation of saidfirst mentioned cam.

2. In a valve operating mechanism, a pair of cams adapted to thecombined operation of a single valve, one of said ca ms being axiallyreciprocable but of operative 4relation to the other of said cams, andmeans effecting the reciprocation of said reciprocable cam.

3. The combination With a valve member, of two cams adapted to engageand operate saidvalve member, cam operating means, and means coaxiallyof the operating means of one of saidcams for reciprocating the othercam into and out of operative relation to said valve member.

In testimony whereof we aHx our signatures in presence of two Witnesses.

EDWARD WOYDT. DEJOE CSANDY.

Witnesses: I

KARL H. BUTLER, ANNA M. Donn.

